Improvement in sawi ng-mach ines



PATENT Ormea ZURIEL SWOPE, OF LANCASTER, PENNSYLVANIA.

IMPROVEMENT IN SAWING-MACHINES.

Specification forming part of Letters Patent No. 55,738, dated June 19,1866.

To all whom t't may concern:

Be it known that I, ZURIEL SWOPE, of the city of Lancaster, in thecounty of Lancaster and State of Pennsylvania, have invented a new anduseful Improvement in SawingMachinos; and l do hereby declare that thefollowing is a clear and exact description of the same, reference beinghad to the annexed draw resents a horizontal scantling or piece, tov

which are framed horizontally at right angles the two parallel pieces BB, with a suitable distance between them for the treadle F to workbetween. To the front endsV of these two pieces B B is framed thehorizontal head-l piece C.

On top of the pieceA are framed, parallel to each other, the two 1.erpeudicular pieces E E, and on front side of these two pieces, abovethe saw-table G, are fastened the two guide-plates M M, for the saw-sashH H to work between theln.

In advance and opposite to the two upright pieces E E are framed, on topof the two horizontal pieces B B, the two upright pieces D D, which arethe two front supports for the sawtable. t

G represents the saw-table, resting its two back corners on two supportsfastened on the front side of the two upright pieces E E, and in frontresting on the two upright supports D D, and is made in height above thetreadle F to reach to the operators waist.

F represents the treadle for the operator to sta-nd on while operatingthe saw. This is generally made of a stout board or plank fastened toand across the shaft Y; is made in breadth or width to till the spacebetween the two horizontal pieces B B, and in depth eX- tends fromhead-piece C, along` the shaft Y, to a proper distance below lthesaw-table G, and on the top surface is made on a level with the centerof the bearings of the shaft.

Y represents the shaft resting its bearing at the one end on thehorizontal head-piece C at l1., and at the other end resting its bearingon the, horizontal piece A at g. On the one end of this shaft, inside ofthe bearing at g, is permanently fastened the crank N. At the end ofthis crank, to a permanent bolt or pin at f, is connected the one end ofpitman L, and the other end of this pitman L is connected by a pin at cto the toggle-joints O and P.

The toggle-joint 0 is connected and supportedat (l to a stationary pinor bolt in the permanent support l, which support is fastened at thelower end, at l, to the horizontal piece A, and at the upper end isfastened permanently at m to the upright piece E. The othertoggle-joint, P, is connected at its lower end by a pin or bolt atb tothe lever J, which is connected and supported at a by a stationary pinor bolt in the lower end of support I, and upon which pin this lever Jrocks when the saw is in operation. .The other end of this lever J isconnected by a pin at c to the lower end of pitman K. The other or upperend of this pitman K is connected by a pin at a to middle of the lowerend of sash H H. All these `joints connected by these bolts are made soas to allow movement of the levers and pitmen on the bolts at b, d, @,f,c, and a, respectively, when the saw is in operation.

Q represents an extension backward of lever J, and upon this extensionis placed a movable weight, R, which serves as a counter-balance to theweight ofthe sawsash H H. This weight It has a set-screw, r, to fastenthe weight on extension Q at any desired point as the action of the sawmay require. When light stuff is sawed the weight ought to be movedfarther out toward the end 5 then, when heavy work is to be done, in thelatter case the weight is moved inward toward the support I. Thus bythis means an equilibrium iu the action ofthe saw may be attained atpleasure.

VV represent a braced support fastened to andextending out from theupper end of upright piece E. 0n the outer end,j, of this support or pinrests the ,rocking bar U U. The

one end of this rocking bar is fastened by a cord or wire to the middleof the top of sash H H, as seen in Fig. 2 at a, and the other cud, at7c, has suspended a cord or chain,W,which is fastened at the lower end,at s, to the rear end of extension Q, and in this chain W, at w, thereis placed a spiral spring to keep the different connections all inproper tension. The rocking bar U U and chain W, as connected withextension Q and top of sash H H, are designed to give a more steadymotion to the operation of the machine.

X represents an iron bar passing through the top ends of the two uprightpieces E E, with set-screws in and outside of the upright pieces E E, toregulate the distance between them.

The sides of the sash H H are parallel, and on the outside thereof havea triangular outline or wedge, and the guides M M have a correspondingtriangular depression to receive said sides.

From the center of the upper and lower parts ofthe saw-sash H H, and iua direction perpendicular to the plane thereof, there proceeds two arms,TT, extending about half the width of the table Gr, toward the operator,and carrying the saw S. The saw is mounted at the ends of these arms bymeans of a swivel and screw, whereby its direction and the amount of itstension may be changed and regulated at pleasure. The swivels p and qare thus formed. There is a i'lat head with slit therein to receive thesaw. The shank is attached to this head and extends in a direction fromthe saw through an orifice in the arms T T, has a screw cut thereon, andis furnished with a nut on its end. Pins pass through the head of theswivels to retain the saw. The lower swivel, q, has one pin-hole. Theupper one has two or more, whereby the saw may he caused to lean forwardif desired.

Z represents a pulley or i'ly wheel resting on supports u and e, and isfurnished on its shaft with crank t, designed to be connected b v aconnecting-rod or pitman to the pin t', on the toggle-joint lever P. Itwill operate as a iiy-wheel to regulate the motion of the saw. Whentreated as a pulley it can be used to apply, if desired, power forpropelling the saw, instead of the operator furnishing the powerhimself. This is an adjunct to the invention, and can be used iuconnection therewith, or be dispensed with, at pleasure.

ln operating the saw by man-power the operator will place himself on thetreadle F, facing the table G, with his feet about in the positionrepresented near Y in Fig. l, and also represented on the surface of thetreadle in Fig. 2. His heels will be close together, and be situatedaboutvertically over the shaft Y. The toes will be extended so that theline of directionof each foot makes an angle of about forty-five degreeswith the shaft Y. A portion of his weight is now brought to rest uponeach foot (or the front part thereof) al ternately, thereby alternatelyraising and de pressing each side of the treadle F. Supposing theoperator, in commencing, rests his weight upon the left foot, therebydepressing the left side of the treadle F, it follows that the end `fofthe crank N advances toward the operators left, extending the pitinan Lhorizontally in the same direction. This motion of the pitman L operatesupon the toggle-jointe to move said joint and the ends of the shortlevers O and P, immediately connected therewith, in the same direction.The effect of this is to move the general direction of said twolast-mentioned levers, connected at c, from a perpendicular and diminishthe distance between the ends b d ofthe said two levers. As the end d ofthe lever O is secured on the permanent support I, this motion raisesthe lever P, which acts in raising the lever J, which is secured at u onsaid permanent support I. This action of the lever J raises the pitinanK, therefore, also, the saw-sash H H, and the action being continuedwill raise it to the end of its stroke. The operator now throws hisweight on the right foot, depressing the right side of the treadle, andthe reverse of all this takes place. The saw-sash H H is depressed, andthe action being continued until the levers O P and toggle-joint e shallbecome situate on the saine straight line, the saw-sash H H will befound to have attained the end of its return or downward stroke, and theaction of depressing the right side of the treadle. being furthercontinued, the pitman L advances horizontal] to right, and end b of thelever P, the lever J, and pitman K raised as before, when the sawsash HH is raised for another stroke.

I do not claim the treadle F, the togglejoint, the saw-frame, nor therespective levers and pitmen in themselves as my invention independentof my mode of combining them, for these are old devices; but

'I claim- Operating a reciprocating saw by means of a treadle and thedevices connected thereto when they are constructed and arranged tooperatein the manner and for the purposes substantially as specified.

' ZURIEL SWOPE.

Witnesses:

REUBEN H. LONG, ABNER D. CAMPBELL.

